JPH06174113A - Rotational distributor - Google Patents

Abstract

PURPOSE: To provide a rotational distributor implementing a new sealing principle capable of facilitating the sealing of the dishibutor for leak-tightness with respect to outside air and enhancing leak-tight sealing performance. CONSTITUTION: This rotational distributor has a rotor 1 having at least one cell 2 and a casing 3 with a supply sleeve 4 and a discharge sleeve 5 for use with powder products, the rotor 1 making rotational movement relative to the casing, with the individual cells 2 arranged to continuously communicate with the supply sleeve 4 as the rotor 1 rotates and then with the discharge sleeve 5, and with the supply sleeve 4 and the discharge sleeve 5 slidably disposed in the casing 3. The distributor also has two seal members 6a, 6b mounted for application of frictional forces to the rotor 1 at any times and having their respective longitudinal axes perpendicular to the axis of rotation of the rotor, and means for adjusting the frictional forces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for continuously supplying or discharging a powder product, and more particularly to a rotary dispensing device having improved leak tight sealing performance.

[0002]

French patent specification 2 012 300 reveals a chute-type dispensing device for feeding and discharging finely divided product into a tank. The above-mentioned rotary distributor has a rotor. At least one cell is formed in this rotor, and is supported by rotating means such as a journal bearing. This rotating means is mounted in a casing with a tubular sleeve for the supply and discharge of the product. Each of the cells is arranged to communicate with these supply and discharge sleeves as the rotor rotates.

The interior of the dispensing device is isolated from the outside air by means of fixed supply and discharge sleeves and by at least one packing box.

An object of the present invention is to provide a rotary distributor using a novel sealing principle which can facilitate the leakproof sealing of the distributor against the outside air and improve the leakproof sealing performance.

[0005]

SUMMARY OF THE INVENTION It is an object of the invention to have a rotor with at least one cell and a casing equipped with a supply sleeve and a discharge sleeve for powder products, the rotor rotating relative to the casing. In a rotary distributor in which the moving and individual cells are arranged to communicate with the feed sleeve and then with the discharge sleeve continuously and with rotation of the rotor, the feed sleeve and the discharge sleeve can slide. It is preferably arranged in a casing, and the distributor is, on the one hand, mounted such that the rotor is always subjected to frictional forces, such that the longitudinal axis is perpendicular to the axis of rotation of the rotor. To provide a rotary distributor characterized in that it has one sealing member and, on the other hand, means for adjusting this frictional force. .

According to a special embodiment, the rotary distributor has two sealing members made of an annular wear ring, the bearing surface of the annular wear ring adjoining the supply sleeve or the discharge sleeve being flat and the rotor. The surface of the annular wear ring, which constantly applies frictional force, has a substantially semi-cylindrical shape in the direction of the rotation axis of the rotor.

[0007]

The advantage of the dispenser of the present invention is that it has a completely leak-proof sealing performance against the outside, so that the powder product is always shielded from the outside air and the outside air is prevented from entering the tank when the powder product is discharged. There is something that can be prevented.

Another advantage of this distributor is the addition of large differential pressures (3 to 10 bar) in plant equipment operating under pressure conditions of 6 to 7 bar, or hot steam pressures of about 200 degrees Celsius. First, it is possible to introduce and release the powder product with a very small amount of leakage.

Another advantage resides in the fact that the dispensing device can be easily disassembled and maintained easily.

Another advantage is that the frictional force exerted on the rotor of each seal member can be adjusted according to the magnitude of the operating pressure.

The rotary dispenser of the present invention can be used, inter alia, in food applications, for example in connection with granular or powdered powder products. Referring to the attached drawings,
Other features and advantages are described below. The invention is not limited to the embodiments shown.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The rotary distributor shown in FIGS. 1 and 2 comprises a cylindrical rotor 1 provided with at least one cell 2. The rotor can comprise 1 to 3 cells. The preferred rotational speed of the rotor can be set to a low speed of approximately 5 to 100 revolutions per minute.

The rotor is arranged in a casing 3, which receives two end flanges 10, 11. These flanges 10 and 11 are rotation guide means 1
Coupling bonded to 6. Rotation guide means 16
Can consist of self-lubricating bearings or rings. The cylindrical rotor 1 is mounted inside the casing 3, and is guided to the casing by these self-lubricating bearings during rotation.

The rotation of the rotor may be one complete rotation with respect to the casing, or it may be limited to oscillating rotation, such as a pendulum. The rotary movement can be performed by a motor (not shown).

Coupling flanges 12a, 12b are formed on each of the supply sleeve 4 and the product discharge sleeve 5. Sealing members 6a, 6b are arranged transversely of the casing, preferably perpendicular to the axis of rotation of the rotor 1, in such a way that they are slidable in the respective product supply and discharge openings. Therefore, these two sleeves are movable and the position of the sleeve can be adjusted and the sleeve can be fixed.

The two seal members 6a and 6b, that is, the wear rings are mounted so that a frictional force is always applied to the rotor. The longitudinal axis of the seal member is orthogonal to the rotation axis of the rotor. The frictional force applied to the rotor can be adjusted using adjusting means 8, 9 such as screws and compression springs.

The material forming each member of the dispensing apparatus of the present invention can be selected according to the high operating temperature of the dispensing apparatus. According to an embodiment of the distributor of the invention, the casing can be made of, for example, temperature-stabilized Z 2 CN 18-10 series stainless steel. The two end flanges can also be constructed of stainless steel.

Self-lubricating bearings are made of polyimide (Kine
l), graphite, or steel nitride.

The rotor may, for example, consist of the same type of stainless steel as the casing, the outer surface of which may be stellite-treated or nitrided and tempered.

The cells of the rotor can be provided with a Teflon coating.

The casing may also include internal channels for heating or cooling the rotary distributor.

A variable clearance of about 1/10 mm is preferably provided in the casing along the longitudinal axis of rotation of the rotor to form the internal bore. This clearance is determined, for example, depending on the rotational speed of the rotor and / or the temperature at which the distributor is used.

The casing may comprise two bores, orthogonal to the longitudinal axis of rotation of the rotor, for receiving the supply sleeve or the discharge sleeve. The two end flanges are
It can be coupled or fixed to the distributor casing by bolting.

According to a variant, the casing can be provided with vent openings so that the pressure can be balanced when the powder product is supplied to or discharged from the rotor cells. This vent opening is installed in the casing and comprises a discharge ring 13, a compression spring 14 and a discharge flange 15.

The sealing member is disposed inside the casing around the entire circumference of the cells of the rotor, contacts the rotor and the supply sleeve or the discharge sleeve, and completely seals the rotor or the cell and the supply sleeve or the discharge sleeve against the outside air. ing.

By using the dispensing device of the invention,
Each of the sleeves can be alternately insulated in a steady or non-steady manner.

According to a special embodiment, the sealing element consists of two annular wear rings. The bearing surface of the annular wear ring in contact with the supply sleeve or the discharge sleeve is flat, and the surface of the annular wear ring that constantly applies frictional force to the rotor is substantially semi-cylindrical in the rotation axis or the longitudinal direction of the rotor. . The wear ring can be constructed from white PTFE or polyimide that has been segmented.

According to another embodiment of the present invention, the sealing member may be a ring having a square or oval cross section.

The means for adjusting the frictional force applied from the seal member to the rotor according to the operating pressure can be constituted by an assembly of a screw and an adjusting spring. The adjusting means is equipped so that the seal member is movable in a frictional state and the force applied to the rotor is kept constant.

By connecting by utilizing the compensation performance of the seal member, the distributor can be constructed in a leaktight sealed state against the outside air.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a rotary distributor of the present invention.

FIG. 2 is a sectional side view of a rotary distributor.

3A and 3B are a side view and a bottom view, respectively, of an annular wear ring of the present invention.

[Explanation of symbols]

 1 Cylindrical rotor 2 Cell 3 Casing 4 Supply sleeve 5 Discharge sleeve 6a Seal member 6b Seal member 8 Adjusting means 9 Adjusting means 10 End flange 11 End flange 12a Coupling flange 12b Coupling flange 13 Discharge ring 14 Compression spring 15 Discharge flange 16 Rotation guide means

Claims (2)

[Claims] 1. A rotary distribution device having a rotor, in particular for feeding and discharging a powder product to a tank, said rotor comprising at least one cell and a supply sleeve and a discharge sleeve for the powder product. With a casing equipped with a rotor, the rotor rotating relative to the casing, the individual cells being arranged to communicate with the supply sleeve and then with the discharge sleeve continuously and with rotation of the rotor. In a rotary distributor, the supply sleeve and the discharge sleeve are slidably arranged in a casing, and the distributor, on the one hand, is mounted on the rotor in such a way that there is always frictional force, It has two sealing members whose axes are orthogonal to the axis of rotation of the rotor and, on the other hand, means for adjusting this frictional force. A rotary distribution device characterized by the above. 2. The rotary distributor according to claim 1, wherein each sealing member is made of an annular wear ring, the bearing surface of the annular wear ring contacting the supply sleeve or the discharge sleeve is flat, and the rotor is always A rotary distributor in which the surface of the annular wear ring applying frictional force is substantially semi-cylindrical in the direction of the axis of rotation of the rotor.